CN108397197A - A kind of suppleing level super thick soil property country rock shaft excavation method - Google Patents
A kind of suppleing level super thick soil property country rock shaft excavation method Download PDFInfo
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- CN108397197A CN108397197A CN201810181858.0A CN201810181858A CN108397197A CN 108397197 A CN108397197 A CN 108397197A CN 201810181858 A CN201810181858 A CN 201810181858A CN 108397197 A CN108397197 A CN 108397197A
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- shaft excavation
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- 239000011435 rock Substances 0.000 title claims abstract description 88
- 239000002689 soil Substances 0.000 title claims abstract description 74
- 238000009412 basement excavation Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000010276 construction Methods 0.000 claims abstract description 29
- 238000005266 casting Methods 0.000 claims description 27
- 239000011347 resin Substances 0.000 claims description 27
- 229920005989 resin Polymers 0.000 claims description 27
- 238000005553 drilling Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 4
- 238000011900 installation process Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000002893 slag Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000003673 groundwater Substances 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
- E21D1/06—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws with shaft-boring cutters
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D7/00—Shaft equipment, e.g. timbering within the shaft
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of suppleing level super thick soil property country rock shaft excavation methods, include the following steps：Step 1：Excavate draining guide hole, draining guide hole connection lower part construction channel downwards from earth's surface along vertical shaft central axis；Step 2：Carry out shaft excavation supporting operation；When the present invention solves suppleing level soil property country rock shaft excavation, soil property country rock covers thickness, soil body bad hydraulic permeability, undesirable using well-points dewatering method effect and the problems such as cost is excessively high；A kind of simple and easy to do, of low cost, effective precipitation method is formd, entire soil property country rock shaft excavation work can be made to carry out in anhydrous conditions, and achieve good economic benefit.
Description
Technical field
The present invention relates to a kind of shaft excavation methods, and in particular to a kind of suppleing level super thick soil property country rock shaft excavation side
Method.
Background technology
Soil property country rock typically refers to include that the soil body, completely decomposed rock, strong-weathered rock etc. are not required to explosion, can be straight with equipment such as backhoes
Connect the country rock for digging dress；It is domestic at present to have had highly developed experience for shaft excavation；But it is extremely rich in rainwater such as Africa
Abundant area, level of ground water is very high, and the soil body is nearly at saturation state；With the increase of cutting depth, shaft bottom will appear largely
Ponding easily causes the sediment failure of the borehole wall to destroy, and is created great difficulties to shaft excavation work；What we were usually most readily conceivable that
Method is that well-points dewatering is used around vertical shaft；But since African Territories soil property country rock ground mulching layer is generally thicker；It is reachable
To 30~60m, and soil body water penetration is very poor；The problems such as undesirable and cost is excessively high there are dewatering effect.
In May, 2015,1# air shaft of the power stations Uganda Ka Luma for underground power house ventilation smoke exhaust proceed by
It excavates；Excavation supporting finishes for its underpart ventilation at that time and safe hole, has lower part construction channel；Vertical shaft depth 90.2m, soil property
Country rock section designs digging diameter 5.3m, is shown through hole drilling of nearby ventilating：Soil property country rock thickness 34.0m；It is deep when being excavated to 9.5m
When, the borehole wall starts to seep water；When being excavated to 12.0m depths, since soil layer entirety water content is big, the borehole wall starts larger ooze occur
Water, soil body self-stable ability are deteriorated, and cave-in is serious after excavation；When to 13.4m depths, borehole wall soil layer without self-stable ability, is opened substantially
After digging cave-in and cavity is formed after extending upwardly to the borehole wall of supporting；When to 13.9m depth, there is upward water burst in shaft bottom
And take a large amount of silts out of, borehole wall soil layer is in semi liquid state, no self-stable ability；When continuing to be excavated to 14.4m depths downwards, borehole wall outflow
Silt is full of shaft bottom again, can not carry out excavating and supporting construction, vertical shaft are stopped work nearly one month；For lowering of watertable, as early as possible
Restart 1# air shafts excavation, takes well-points dewatering measure well week, but due to soil layer bad hydraulic permeability, dewatering effect is not
It is slow to excavate progress for ideal.
Invention content
The present invention provides a kind of simple and easy to do, of low cost, significant effect, and entire soil property country rock shaft excavation can be made to work
The suppleing level super thick soil property country rock shaft excavation method carried out in anhydrous conditions.
The technical solution adopted by the present invention is：A kind of suppleing level super thick soil property country rock shaft excavation method, including it is following
Step：
Step 1：Excavate draining guide hole, draining guide hole connection lower part construction channel downwards from earth's surface along vertical shaft central axis；
Step 2：Carry out shaft excavation supporting operation.
Further, the construction method that guide hole is drained in the step 1 is as follows：
S1：The excavation that soil property country rock section drains guide hole is carried out according to design diameter, until being excavated to bedrock surface；
S2：Reaming is carried out to soil property country rock section draining guide hole from top to bottom；
S3：Temporary casing is installed in soil property country rock section draining guide hole after reaming；
S4：It carries out rock section draining guide hole to excavate, until with lower part construction channel perforation；
S5：The permanent water-permeable pipe that diameter is less than temporary casing is installed in temporary casing；
S6：Casting resin backfill is carried out between hole wall after permanent water-permeable pipe and reaming and takes out temporary casing, the row of completion
Water guide hole excavates.
Further, in the casting resin after the permanent water-permeable pipe and reaming between hole wall, lower part casting resin grain size is more than
Top casting resin；Temporary casing is taken out after the completion of the casting resin filling of lower part, is then further filled with top casting resin.
Further, the permanent water-permeable pipe upper edge its be arranged circumferentially permeable gap.
Further, the lower part casting resin be 5~10mm of grain size gravel or well cuttings, top casting resin be 2~
The sand of 5mm.
Further, the soil property country rock section draining guide hole diameter is less than rock section draining guide hole diameter；Soil property country rock section
The a diameter of 140mm of guide hole is drained, rock section drains a diameter of 155mm of guide hole.
Further, the excavation of soil property country rock section draining guide hole is carried out by drilling tool in the step S1, according to drilling speed
Degree and the landwaste returned judge whether to be drilled into bedrock surface.
Further, reaming is carried out using drag bit in the step S2.
Further, four groups of gaps are provided on the permanent water-permeable pipe, circumferential spacing is 35mm, and single gap is long
75mm, slit width 1.5mm, spacing 8.5mm.
Further, the installation process of permanent water-permeable pipe is installed for merogenesis in the step S5, is led close to rock section draining
Bottom is expanded into caliber first before Kong Yijie installations；Its caliber is expanded to drains guide hole diameter more than rock section.
The beneficial effects of the invention are as follows：
(1) when the present invention solves suppleing level soil property country rock shaft excavation, soil property country rock covering thickness, bad hydraulic permeability,
Problem undesirable using well-points dewatering method effect and that cost is excessively high；
(2) simple and practicable, of low cost, significant effect of the invention；
(3) present invention can ensure that entire soil property country rock shaft excavation work carries out in anhydrous conditions, achieve good
Economic benefit.
Description of the drawings
Fig. 1 is operation principle schematic diagram of the present invention.
Fig. 2 is that guide hole structure schematic diagram is drained in the present invention.
Specific implementation mode
The present invention will be further described in the following with reference to the drawings and specific embodiments.
As shown in Figure 1 and Figure 2, a kind of suppleing level super thick soil property country rock shaft excavation method, includes the following steps：
Step 1：Excavate draining guide hole 1 downwards from earth's surface along vertical shaft central axis, it is logical that draining guide hole 1 is connected to lower part construction
Road；
Step 2：Carry out shaft excavation supporting operation.
It is downward from earth's surface along vertical shaft central axis for lowering of watertable when suppleing level soil property country rock shaft excavation
It bores vertical centre and drains guide hole 1 to lower part construction channel, as shown in Figure 1；Guide hole 1 is drained by center earth's surface and lower part are constructed
Channel connection allows the interior infiltration of well, ponding to drain guide hole 1 by center and flows into lower part construction channel, then constructed in channel by lower part
Special pumping equipment be pumped to outside hole, carried out to ensure that shaft excavation is operated in water-less environment；Then according to conventional perpendicular
Well excavation method carries out excavation supporting operation.
Detailed process is as follows：Center is bored to lower part construction channel (connection hole) drain guide hole 1 from earth's surface along vertical shaft center line；
AperturePermanent water-permeable pipe is set in hole；Well internal water accumulation or construction water are led by center draining when shaft excavation
Hole 1 flows into the catch pit in lower part construction channel；Simultaneously as setting permanent water-permeable pipe 2 in center draining guide hole 1, underground water exists
Under gravity, oblique flow is generated, dropdown curve as shown in Figure 1 is formed, level of ground water is made to be less than shaft excavation work surface；
Underground water converges in center draining guide hole 1, flows into the catch pit in lower part construction channel；The mine water that catchments passes through lower part
The drainage system constructed in channel, is pumped to through working tunnel outside hole.
Further, the construction method that guide hole 1 is drained in the step 1 is as follows：
S1：The excavation that soil property country rock section draining guide hole 1-1 is carried out according to design diameter, until being excavated to bedrock surface；
S2：Reaming is carried out to soil property country rock section draining guide hole 1-1 from top to bottom；
S3：Temporary casing 3 is installed in soil property country rock section draining guide hole 1-1 after reaming；
S4：It carries out rock section draining guide hole 1-2 to excavate, until with lower part construction channel perforation；
S5：Installation diameter is less than the permanent water-permeable pipe 2 of temporary casing 3 in temporary casing 3；
S6：Casting resin backfill is carried out between hole wall after permanent water-permeable pipe 2 and reaming and takes out temporary casing 3, is completed
Guide hole 1 is drained to excavate.
Further, in the casting resin after the permanent water-permeable pipe 2 and reaming between hole wall, lower part casting resin grain size is more than
Top casting resin；Temporary casing 3 is taken out after the completion of the casting resin filling of lower part, is then further filled with top casting resin.
Further, 2 upper edge of permanent water-permeable pipe its be arranged circumferentially permeable gap.
Further, the lower part casting resin be 5~10mm of grain size gravel or well cuttings, top casting resin be 2~
The sand of 5mm.
Further, the soil property country rock section draining guide hole 1-1 diameters are less than rock section draining guide hole 1-2 diameters；Soil property
Country rock section drains the guide hole a diameter of 140mm of 1-1, and rock section drains a diameter of 155mm of guide hole 1-2.
Further, the excavation of soil property country rock section draining guide hole 1-1 is carried out by drilling tool in the step S1, according to drilling
Speed and the landwaste of return judge whether to be drilled into bedrock surface.
Further, reaming is carried out using drag bit in the step S2.
Further, four groups of gaps are provided on the permanent water-permeable pipe 2, circumferential spacing is 35mm, and single gap is long
75mm, slit width 1.5mm, spacing 8.5mm.
Further, the installation process of permanent water-permeable pipe 2 is installed for merogenesis in the step S5, is led close to rock section draining
Bottom is expanded into caliber first before the section installations of hole 1-2 mono-；Its caliber is expanded to drains guide hole 1-2 diameters more than rock section.
Ka Luma tailwater tunnels are equipped with 4#, 5# air shaft, and the 8# working tunnels between the main hole 1#, 2# connect respectively for bottom
Logical hole, 9# working tunnels connection hole communicate；It is mainly used for wide open digging stage ventilation smoke exhaust；The soil of underground power house 1# air shafts
Matter country rock section excavates the problem of groundwater encountered, and an important topic is proposed to tailwater tunnel project scientific research personnel：How
When 4#, 5# air shaft excavate, as possible under the premise of not increasing excavation cost, realizes the decline of level of ground water, ensure the borehole wall
Stablize and excavation is made to be operated under water-less environment and carries out, the key that just can be smoothly excavated at two air shafts.
Guide hole is drained in Ka Luma hydropower projects to be mainly used for excluding well internal water accumulation and collect draining guide hole peripherally
Lower water infiltration；Large aperture should not be selected, 4#, 5# air shaft top soil property country rock section in the practice of Ka Luma Hydropower Projects
D=140mm, lower part rock section is taken to take D=155mm；Draining guide hole depth H, that is, vertical shaft center ground to lower part is constructed channel
The depth at top namely the depth of vertical shaft；In the construction of 4# air shafts, H=95.78m, 5# vertical shafts is taken to take H=93.40m.
Permanent water-permeable pipe is mainly used for soil property country rock section, selects the permeable casing of PVC plastic；Sleeve outer and guide hole diameter phase
Together；Its diameter d=140mm is taken in the construction of 4#, 5# air shaft；Tubing depth h is i.e. within the scope of from earth's surface to basement rock, i.e. soil property
Country rock vertical shaft section is required to that permeable casing is arranged；In the construction of 4# air shafts, h=35.20m, 5# vertical shafts h=49.07m；Thoroughly
Jacket pipe single-unit clear length L=290cm, outer diameter φ=140mm, casing wall thickness δ=7mm, internal thread length and outer filament length degree are
6mm；It is 35mm, the long 75mm in single gap, slit width 1.5mm, spacing that casing has four groups of gaps, circumferential spacing along conduit circumferential direction
8.5mm。
Guide hole structure is drained as shown in Fig. 2, guide hole construction uses vehicle-mounted well rig, Specific construction process as follows：
Soil property country rock thickness is verified first, using φ 152mm drilling tools, is drilled down into from vertical shaft central axis, until boring
Until basement rock；It can judge whether to be drilled into bedrock surface from rate of penetration and the landwaste situation of return；It constructs in 4# air shafts
In, verify soil property country rock thickness h=35.20m；5# air shaft soil property country rocks thickness h=49.07m；φ 152mm drilling tools are got into
It after basement rock, falls back on ground and removes drilling tool, change φ 228mm drag bits, carry out reaming from top to bottom to bedrock surface；Reaming metapore
Diameter reaches φ 250mm, and temporary casing is installed after reaming, using φ 200mmPVC plastic tubes, wall thickness 9mm；Temporary casing installs
Cheng Hou rechanges φ 152mm drilling tools, is drilled down into from bedrock surface, is penetrated through until with lower part construction channel (being connected to hole), to
It forms φ 155mm rock sections and drains guide hole；Soil property country rock section drains the permanent water-permeable pipe in guide hole and uses φ 140mmPVC plastics
Water-permeable pipe, wall thickness 7mm, tube wall are equipped with permeable gap；Bottom casing joint is before being put into draining guide hole, first by bottom
Heating expands caliber to φ 165mm；Then it is put into hole section by section, until installation is complete for permanent water-permeable pipe in draining guide hole；It will set
It is that can its bottom be sleeved on base in order to which its base diameter drains guide hole diameter slightly larger than rock section that bottom of the tube, which carries out heating expander,
Rock section drains outside guide hole, and permanent water-permeable pipe is avoided to sink；Permanent water-permeable pipe is after installation is complete, hole wall after permanent water-permeable pipe and reaming
Between backfilled using casting resin and extract temporary casing；The effect of casting resin is to filter out the mud particles carried in underground water, is prevented
Only permanent water-permeable pipe gap blocks；Casting resin earth-filling method：It is deep that 1.0m is inserted first between permanent water-permeable pipe and temporary casing
Well cuttings and the gravel that grain size is 5~10mm, then extract temporary casing, then it is 5~10mm slowly to insert grain size with spade
Sand；Casting resin can not be too fast when inserting, to prevent pore plugging between casing and hole wall.
Shaft excavation construction is finally carried out, the upper and lower two parts of work point is excavated and carries out；Top soil property country rock, which excavates, to be used
0.11m3Mini-excavator directly digs dress 1.2m in well3Hanging basket, hand fit fill slag；Gantry crane promotes hanging basket to ground, slag charge
Transport Dumping Sites to；Using steel ring beam combination anchor, net, spray supporting；Lower part basement rock shaft excavation uses anti-well drilling machine construction φ 1.4m
Slag well is slipped, as slipping slag channel；Vertical hole, photoface exploision are bored using YT28 hand air drills；Slag charge enters lower part company by slipping slag well
In logical hole, slagged tap by 8#, 9# working tunnel, slag charge transports Dumping Sites to.
Method using the present invention drains guide hole precipitation technology by center and uses well-points dewatering technology, carries out respectively
The economic efficiency contrast situation that 4#, 5# air shaft soil property country rock section are excavated, as shown in table 1.
1. two methods Economic and Efficiency Analysis of table compares
From table 1 it follows that using the method for the present invention compared with being excavated using well-points dewatering technology, it is cost-saved altogether
65.67 ten thousand yuan；Economic and Efficiency Analysis estimation conditions are as follows：(1) drilling of center osculum and well-points dewatering drilling are all made of locality
Working sources；(2) 4# air shafts soil property country rock thickness 35.20m, 5# air shafts soil property country rock thickness 49.07m, Construction of Silo are accurate
The standby phase is 1 month, and soil layer construction speed is 0.8m/ days；(3) actual measurement 4#, 5# air shaft center draining guide hole infiltration flow point
It Wei not 5.28m3/h、4.85m3/h；(4) sump lift is respectively outside catch pit to hole in 8#, 9# working tunnel connection hole
101.5m, 68.0m, sump to sedimentation basin lift is respectively 8.0m, 12.0m outside hole；(5) according to soil depth, spray should be used
Well-points dewatering technology is penetrated, by double well-point arrangement；With reference to quota, people, material, machine are adjusted according to actual cost and field condition,
Middle power supply for construction is self power generation, and cost is 3 yuan/Kwh, calculates the deviation between depth in well-points dewatering depth and quota, presses
Interpolation method exploitation.
When the present invention solves suppleing level soil property country rock shaft excavation, soil property country rock covers thickness, soil body bad hydraulic permeability,
It is undesirable using well-points dewatering method effect and the problems such as cost is excessively high；Form a kind of simple and easy to do, of low cost, significant effect
Precipitation method, entire soil property country rock shaft excavation work can be made to carry out in anhydrous conditions, and achieve good economic effect
Benefit.
Claims (10)
1. a kind of suppleing level super thick soil property country rock shaft excavation method, which is characterized in that include the following steps：
Step 1：Draining guide hole (1) is excavated downwards from earth's surface along vertical shaft central axis, and it is logical that draining guide hole (1) is connected to lower part construction
Road；
Step 2：Carry out shaft excavation supporting operation.
2. a kind of suppleing level super thick soil property country rock shaft excavation method according to claim 1, which is characterized in that described
The construction method that guide hole (1) is drained in step 1 is as follows：
S1：The excavation that soil property country rock section draining guide hole (1-1) is carried out according to design diameter, until being excavated to bedrock surface；
S2：Reaming is carried out to soil property country rock section draining guide hole (1-1) from top to bottom；
S3：Installation temporary casing (3) in soil property country rock section draining guide hole (1-1) after reaming；
S4：It carries out rock section draining guide hole (1-2) to excavate, until with lower part construction channel perforation；
S5：Installation diameter is less than the permanent water-permeable pipe (2) of temporary casing (3) in temporary casing (3)；
S6：Casting resin backfill is carried out between hole wall after permanent water-permeable pipe (2) and reaming and takes out temporary casing (3), is completed
Guide hole (1) is drained to excavate.
3. a kind of suppleing level super thick soil property country rock shaft excavation method according to claim 2, which is characterized in that described
In casting resin after permanent water-permeable pipe (2) and reaming between hole wall, casting resin grain size in lower part is more than top casting resin；Lower part is filled
Temporary casing (3) is taken out after the completion of filler filling, is then further filled with top casting resin.
4. a kind of suppleing level super thick soil property country rock shaft excavation method according to claim 2, which is characterized in that described
On permanent water-permeable pipe (2), permeable gap has been arranged circumferentially along it.
5. a kind of suppleing level super thick soil property country rock shaft excavation method according to claim 3, which is characterized in that described
Lower part casting resin is the gravel or well cuttings of 5~10mm of grain size, and top casting resin is the sand of 2~5mm.
6. a kind of suppleing level super thick soil property country rock shaft excavation method according to claim 2, which is characterized in that described
Soil property country rock section drains guide hole (1-1) diameter and is less than rock section draining guide hole (1-2) diameter；Soil property country rock section drains guide hole (1-
1) a diameter of 140mm, rock section drain guide hole (1-2) a diameter of 155mm.
7. a kind of suppleing level super thick soil property country rock shaft excavation method according to claim 2, which is characterized in that described
The excavation of soil property country rock section draining guide hole (1-1) is carried out by drilling tool in step S1, is sentenced according to rate of penetration and the landwaste of return
It is disconnected whether to be drilled into bedrock surface.
8. a kind of suppleing level super thick soil property country rock shaft excavation method according to claim 2, which is characterized in that described
Reaming is carried out using drag bit in step S2.
9. a kind of suppleing level super thick soil property country rock shaft excavation method according to claim 4, which is characterized in that described
Four groups of gaps are provided on permanent water-permeable pipe (2), circumferential spacing is 35mm, the long 75mm in single gap, slit width 1.5mm, spacing
8.5mm。
10. a kind of suppleing level super thick soil property country rock shaft excavation method according to claim 2, which is characterized in that institute
It states the installation process of permanent water-permeable pipe (2) in step S5 to install for merogenesis, close to rock section draining guide hole (1-2) section installation
It is preceding that bottom is expanded into caliber first；Its caliber is expanded to drains guide hole (1-2) diameter more than rock section.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577330A (en) * | 2020-05-08 | 2020-08-25 | 平煤神马建工集团有限公司 | Construction method for open channel section of large-section inclined shaft and high-strength combined template thereof |
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| CN105201513A (en) * | 2015-09-11 | 2015-12-30 | 重庆工程职业技术学院 | Shaft construction method for rail transit |
| CN204940315U (en) * | 2015-09-28 | 2016-01-06 | 北京城建道桥建设集团有限公司 | A kind of water-stopping system for the large-scale vertical shaft of region of FuShui |
| CN105507336A (en) * | 2015-11-27 | 2016-04-20 | 上海长凯岩土工程有限公司 | Method for forming composite foundation by using dewatering well |
| CN205369281U (en) * | 2015-12-29 | 2016-07-06 | 浙江大学城市学院 | Radial precipitation structure |
| CN105587320A (en) * | 2016-01-29 | 2016-05-18 | 中铁第一勘察设计院集团有限公司 | Water-rich sandy cobble ground heteromorphosis deep shaft structural system and construction method thereof |
| CN107035376A (en) * | 2017-05-19 | 2017-08-11 | 陕西长武亭南煤业有限责任公司 | One kind common law in huge thick bedrock aquifer digs shaft construction method |
| CN107387090A (en) * | 2017-09-10 | 2017-11-24 | 沈阳建筑大学 | Deep layer tunnel shaft is accessed with water purification desilting function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577330A (en) * | 2020-05-08 | 2020-08-25 | 平煤神马建工集团有限公司 | Construction method for open channel section of large-section inclined shaft and high-strength combined template thereof |
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